Talking-machine sound box and reproducer.



P. B- DELANY. TALKING MACHINE SOUND BOX AND REPRODUCER APPLICATION FILED MAY? 19?].

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PATRICK B. DELANY, 075 SOUTH ORANGE, NEW JERSEY.

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Specification of Letters Patent.

Patented Apr. 2, 191%.

Application filed. May 7, 1917. Serial No. 168,951.

To all whom it may concern:

Be it known that I, PATRICK B. DELANY, a citizen of the United States, residing at South Orange, in the county of Essex and State of New Jersey, have int-"outed certain new and useful Improvements in Talking- Machine Sound Boxes and Ileproducers, of which the following is a specification.

My invention contemplates certain improvements in talking machine sound boxes and roproducers.

As illustrated in the accompanying drawing, Figure 1 is a face view of the sound box complete. Fig. 2 is a perspective of the vibrating arm detached. Fig. 3 is a section on line 3 3, Fig. 1. Fig. t differs slightly from the illustration of Fig. 3 in that it shows the threaded engagement between the cruciform vibrating arm and its supports having right and left threads. Fig. 5 is a section on line 55, Fig. 1. Fig 6 shows one of the gaskets between which the dia phragm is mounted. Fig. 7' is a cross section of Fig. 6.

Referring to the drawing I have shown a casing 1 inclosing the diaphragm 2 and furnishing a base for the supports 3 on which the vibrating needle carrying arm 4: is mounted.

These arm supports are shown mounted in recesses 5 which may be of rectangular form as in Fig. 3 or cone shaped as in Fig. 4.. The recesses are adapted to contain a meltable composition 6 which may consist of any preferred ingredients. I have found that a composition of tar, resin, and gutta percha produces satisfactory results, preferably by combining three parts of gutta percha to one part each of the tar and resln.

. The supports 3 are interiorly threaded to receive the lateral arms 7 of the arm 4: and

this threaded engagement may be straight or continuous as in Fig. 3 or by right and left threads as in Fig. 4t.

As shown in detail in Fig. 5 the diaphragm 2 is mounted between gaskets 8 which are preferably made of the above described composition 6. I

From the foregoing. it will be apparent that the main idea of my invention is to enhance the powers of reproduction by providing a maximum freedom of movement of the vibrating arm within certain limits. This is accomplished by rigidly securing the supports 3 in a melt-able mass and mounting the arm to swing in the supports with the least possible resistance by friction. lVith the arm mounted in the supports the compo sltion, in a plastic state, is poured into the recesses 5. Hence before becoming rigid the supports conform in position to the requirements of the arms 7. This position is permanently maintained when the composition hardens and insures a free movement of the arm and an even pressure upon the diaphragm. Furthermore there being no 1nechanical adjusting parts a user cannot tamper with the needle and destroy its efficiency.

The gaskets 8 have been found more durable than the rubber gaskets usually employed.

I have found that the slight movement of the arm in the threaded supports furnishes a'cushion gainst the rattling of the armdue to coarse vibrations and that the right and left thread embodiment of Fig. 4- is especially adapted to the attainment of this re- 7 sult by putting a brake on any tendency of the arm to get beyond control laterally arismg from any defect in the walls of the rec- 0rd groove produced by wear.

It will be observed that the supports 3 are separate members and are separately secured to the frame of the sound box. In this way a very accurate adjustment of the supports may be obtained. Furthermore, inasmuch as the supports are secured to the box by masses of a meltable material the supports may be mounted while the material is soft and accurately adjusted before the masses harden. When the masses do harden the supports and the parts connected therewith are permanently held in proper condition for accurate operation. The masses of meltable material also serve to insulate the working parts of the device from vibrations of the sound box frame or casing.

I claim as my invention:

1. In a sound box, a vibrating arm having screw-threaded extensions projecting laterally from and movable with said arm, and supports for said extensions having threaded portions with which said extensions engage and in which they turn.

2. In a sound box, a vibrating arm having screw-threaded extensions projecting laterally from and movable with said arm, and independently adjustable supportsfor said extensions having threaded portions with which said extensions engage and in which they turn.

3. In a sound box, a vibrating arm having screw-threaded extensions projecting laterally from and movable with said arm, and supports for said extensions independently attached to the frame of the sound box and having threaded portions with which said extensions engage and in which they turn.

4:. In a sound box, a vibrating arm having lateral extensions, supports in the outer ends on which the extensions are mounted to turn, and masses of a meltable composition fixed in the frame of the sound box in which the I, it i inner ends of the supports are adjusted and 15 other of said extensions having a left handed screw-thread, and corresponding screwthreaded supports having threaded engagement with said extensions.

In testimony whereof, I have hereunto subscribed my name.

PATRICK B. DELANY.

l nateat may be obtained tor nve cents each, by addressing the "commissioner of Patents,

Washington, D. 0. 

